Brian,
I upgraded to the latest distribution but still had issues with the
RunString included. Seems GetGlobals also has issues. I ended up
re-writing the implementation as such follows. This seems to work
reliably. One difference from the two implementations is I'm sending
__builtin__ as the globals dictionary Searching through the Python mail
archives I found a couple of references that this is the correct thing
todo. Also, I'm keeping the locals dictionary around, seems like the
right things todo, but not sure.
protected static PyDict locals = null;
public static PyObject RunString(string code)
{
PyDict globals = new
PyDict(Runtime.PyModule_GetDict(ImportModule("__builtin__").Handle));
if(locals == null)
{
locals = new PyDict(Runtime.PyDict_New());
}
IntPtr flag = (IntPtr)257; /* Py_file_input */
IntPtr result = Runtime.PyRun_String(code, flag, globals.Handle,
locals.Handle);
if (result == IntPtr.Zero)
{
return null;
}
return new PyObject(result);
}
Brian Lloyd wrote:
>Hi Michael - I assume you're running an older version of
>Python for NET? The current version has an implementation
>of RunString:
>
> public static PyObject RunString(string code) {
> IntPtr globals = Runtime.PyEval_GetGlobals();
> IntPtr locals = Runtime.PyDict_New();
>
> IntPtr builtins = Runtime.PyEval_GetBuiltins();
> Runtime.PyDict_SetItemString(locals, "__builtins__", builtins);
>
> IntPtr flag = (IntPtr)257; /* Py_file_input */
> IntPtr result = Runtime.PyRun_String(code, flag, globals, locals);
> Runtime.Decref(locals);
> if (result == IntPtr.Zero) {
> return null;
> }
> return new PyObject(result);
> }
>
>The trick is that for various reasons you can't depend on the
>PyEval_GetLocals call to return anything meaningful, so you have
>to build the locals dict manually.
>
>HTH,
>
>
>Brian Lloyd [EMAIL PROTECTED]
>V.P. Engineering 540.361.1716
>Zope Corporation http://www.zope.com
>
>
>
>
>>-----Original Message-----
>>From: [EMAIL PROTECTED]
>>[mailto:[EMAIL PROTECTED] Behalf Of Michael Eddington
>>Sent: Sunday, August 14, 2005 1:36 AM
>>To: pythondotnet@python.org
>>Subject: [Python.NET] Adding PyRun_String to Runtime
>>
>>
>>I would like to run Python strings and get an object return from .NET.
>> To this end I added PyRun_String to the Runtime object and another
>>method to PythonEngine ala the existing SimpleString implementation.
>>
>>Everything compiles, but Runtime.PyRun_String always returns a NULL,
>>and it does not look like the code is being run.
>>
>>Is there any trick to adding new methods to the Runtime?
>>
>>// From Runtime.cs
>>
>> [DllImport(Runtime.dll, CallingConvention=CallingConvention.Cdecl,
>> ExactSpelling=true, CharSet=CharSet.Ansi)]
>> internal unsafe static extern IntPtr
>> PyRun_String(string code, int start, IntPtr globals,
>>IntPtr locals);
>>
>>
>>// From Python.cs
>>
>> public static PyObject RunString(string code)
>> {
>> IntPtr globals = Runtime.PyEval_GetGlobals();
>> IntPtr locals = Runtime.PyEval_GetLocals();
>> IntPtr ret;
>>
>> ret = Runtime.PyRun_String(code,
>>257,globals, locals);
>>
>> Runtime.Decref(globals);
>> Runtime.Decref(locals);
>>
>> if (ret == IntPtr.Zero)
>> {
>> throw new PythonException();
>> }
>>
>> return new PyObject(ret);
>> }
>>_________________________________________________
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>>http://mail.python.org/mailman/listinfo/pythondotnet
>>
>>
>>
>
>
>
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